<div class="">
  <!-- profile-demo -->
  <!-- <h4>profile-demo</h4>
  <app-profile-card [profile]='profile'></app-profile-card>
  <h4>ChangeDetectorRef - demo</h4>
  <app-change-parent></app-change-parent>
  <h4>ChangeDetectorRef - demo</h4>
  <app-change-couter [addStream]="counterStream"></app-change-couter> -->
  <h3>测试子模块的路由使用</h3>
  <router-outlet></router-outlet>
</div>
